Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability in Multer prior to version 2.1.0 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing resource exhaustion. Users should upgrade to version 2.1.0 to receive a patch. No known workarounds are available.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-xf7r-hgr6-v32p Multer vulnerable to Denial of Service via incomplete cleanup
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 19 Mar 2026 17:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:expressjs:multer:*:*:*:*:*:node.js:*:*

Tue, 03 Mar 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important


Mon, 02 Mar 2026 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Expressjs
Expressjs multer
Vendors & Products Expressjs
Expressjs multer

Fri, 27 Feb 2026 18:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 27 Feb 2026 16:00:00 +0000

Type Values Removed Values Added
Description Multer is a node.js middleware for handling `multipart/form-data`. A vulnerability in Multer prior to version 2.1.0 allows an attacker to trigger a Denial of Service (DoS) by sending malformed requests, potentially causing resource exhaustion. Users should upgrade to version 2.1.0 to receive a patch. No known workarounds are available.
Title Multer vulnerable to Denial of Service via incomplete cleanup
Weaknesses CWE-459
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: openjs

Published:

Updated: 2026-02-27T17:12:45.375Z

Reserved: 2026-02-26T20:42:41.095Z

Link: CVE-2026-3304

cve-icon Vulnrichment

Updated: 2026-02-27T17:12:37.799Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-27T16:16:26.380

Modified: 2026-03-19T17:28:33.810

Link: CVE-2026-3304

cve-icon Redhat

Severity : Important

Publid Date: 2026-02-27T15:44:37Z

Links: CVE-2026-3304 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-03-02T12:07:08Z

Weaknesses